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tun: use symmetric hash 

Tun actually expects a symmetric hash for queue selecting to work
correctly, otherwise packets belongs to a single flow may be
redirected to the wrong queue. So this patch switch to use
__skb_get_hash_symmetric().

Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jason Wang 2017-06-06 14:09:49 +08:00 committed by David S. Miller
parent 5461bd41fd
commit feec084a7c
1 changed files with 3 additions and 3 deletions
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6
drivers/net/tun.c
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@ -465,7 +465,7 @@ static u16 tun_select_queue(struct net_device *dev, struct sk_buff *skb,
rcu_read_lock();
numqueues = ACCESS_ONCE(tun->numqueues);
txq = skb_get_hash(skb);
txq = __skb_get_hash_symmetric(skb);
if (txq) {
e = tun_flow_find(&tun->flows[tun_hashfn(txq)], txq);
if (e) {
@ -867,7 +867,7 @@ static netdev_tx_t tun_net_xmit(struct sk_buff *skb, struct net_device *dev)
*/
__u32 rxhash;
rxhash = skb_get_hash(skb);
rxhash = __skb_get_hash_symmetric(skb);
if (rxhash) {
struct tun_flow_entry *e;
e = tun_flow_find(&tun->flows[tun_hashfn(rxhash)],
@ -1334,7 +1334,7 @@ static ssize_t tun_get_user(struct tun_struct *tun, struct tun_file *tfile,
skb_reset_network_header(skb);
skb_probe_transport_header(skb, 0);
rxhash = skb_get_hash(skb);
rxhash = __skb_get_hash_symmetric(skb);
#ifndef CONFIG_4KSTACKS
tun_rx_batched(tun, tfile, skb, more);
#else